Try Rector Online | Rector - Automated Way to Instantly Upgrade and Refactor any PHP code

Run Rector on your code to see what it can do for you:

 <?php
 
 namespace Test;

 {
     public function test(): void
     {
-        $someObject = $this->getSomeObject();
+        $someObject = $this->getSomeObject();
+        $this->assertInstanceof(\Test\SomeClassUsedInTests::class, $someObject);
         $value = $someObject->getSomeMethod();
 
-        $this->assertSame(123, $value);
+        $this->assertSame(123, $value);
+        $this->assertInstanceof(\Test\SomeClassUsedInTests::class, $someObject2);
 
         $someObject2 = $this->getSomeObject2();
         $value2 = $someObject2->getSomeMethod();

PHP snippet to change

<?php

namespace Test;

use PHPUnit\Framework\TestCase;

class SomeClassUsedInTests
{
	public function getSomeMethod() { return 123; }
}

final class MultipleAssert extends TestCase
{
    public function test(): void
    {
        $someObject = $this->getSomeObject();
        $value = $someObject->getSomeMethod();

        $this->assertSame(123, $value);

        $someObject2 = $this->getSomeObject2();
        $value2 = $someObject2->getSomeMethod();

        $this->assertSame(123, $value2);
    }

    private function getSomeObject(): ?SomeClassUsedInTests
    {
        if (mt_rand(0, 1)) {
            return new SomeClassUsedInTests();
        }

        return null;
    }

    private function getSomeObject2(): ?SomeClassUsedInTests
    {
        if (mt_rand(0, 1)) {
            return new SomeClassUsedInTests();
        }

        return null;
    }
}

Applied Rules:

AddInstanceofAssertForNullableInstanceRector

Not a change you expect?

Create an issue on GitHub
...or to speed up fix – add a test fixture

Config rector.php

<?php

declare(strict_types=1);

use Rector\Config\RectorConfig;
use Rector\PHPUnit\CodeQuality\Rector\ClassMethod\AddInstanceofAssertForNullableInstanceRector;

return static function (RectorConfig $rectorConfig): void {
    $rectorConfig->rule(AddInstanceofAssertForNullableInstanceRector::class);
};

Rector version: b855ff - released at 2026-01-22 19:37